Roadbunner,

I've read the entire thread, and personally, I'd go with the Madone. It sounds like it fits you better with less tweaking. I don't know anything about Madones, though -- is there a model with Ultegra you could get instead, if you really like the Ultegra on the Onix? Or does that put it into an even higher price bracket?

I'd always go with the better fitting bike FRAME geometry before anything else. Everything else can be changed. The frame cannot.

Good luck, and keep us posted!

Emily